Pick-off means for gumming machines



July 16, 1935- G. w. VON HOFE PICK-OFF MEANS FOR GUMMING MACHINES Filed Sept. 14, 1934 INVENTOR.

650.866 W I/a/v 6 0/1- CZ WMM ATTORNEYS ill Patented July 16, 1935 PICK-OFF MEANS FOR GUMIIING MACHINES George W. von Hoie, Bound Brook, N. J., assignor to New Jersey Machine Corporation, Hoboken, N. 1., a corporation of New Jersey Application September 14. 1934, Serial No. 743,930

6 Claims.

My invention relates to gumming machines for applying adhesive to sheets of paper or other material, which machines usually include a gumming roll against which individual sheets or their equivalent are fed and whereby the adhesive is applied to said sheets or other material. Such machines further generally include a pick-off means for stripping the adhesive coated sheets from the gumming roll and a reversing roll cooperating with a deflecting means whereby the travel of the sheets or other material from the gumming roll is controlled.

In existing machines of the indicated type, the deflecting means and the pick-oil means are fixed relatively to each other and the extremepolnt of the latter alone rests upon the surface of the gumming roll. These points are subject to constant wear and consequently soon become inefilcient in action and require frequent sharpening to avoid tearing or crumpling of the sheets or other material and resulting clogging of the machine. Continuous wear and repeated sharpening of the points of the pick-off means tend to bring the latter, of which there are several in a given machine, out of alignment with each other with the result that the wet sheets or othermaterial are unevenly engaged and are torn or wrinkled, thus bringing about a defective operation or clogging of the machine. I

The object of the present invention'is to pro vlde a pick-off means of improved and simplifled construction in which existing objections and disadvantages are avoided and which operates in an efiiclent manner for maximum periods of timewithout replacement. The invention further contemplates the provision of an improved construction in which replacement, when required, may be eihciently effected in a minimum of time and with a minimum of effort. Other more specific objects will appear from the description hereinafter and the features of novelty will be pointed out in the claims.

In the accompanying drawing, which illustrates an example of the invention without de-, r fining its limits, Fig. 1 is a fragmentary sectional view of a gumming machine with a selected form of the novel pick-oil means embodied therein; Fig. 2 is a fragmentary plan view; Fig. 3 is a detail sectional view on the line 3--3'of Fig. 1. and Fig. 4 is a perspective detail view of the-pickoff member.

The fragmentary view of the gumming machine illustrated in Fig. 1 of the drawing shows a gumming roll 5 of any customary construction and mounted in the machine in any conventional manner; this gumming roll 5 may itself dip into a supply of suitable adhesive or, as shown in Fig. 1, may have rolling contact with a transfer roll 6 adapted to transfer adhesive from a supply thereof to the surface of the gumming roll 5 in any suitable manner. The machine may further include a stationary bar 1 across which the sheets of paper or other material 8 may be fed in the direction of the arrow 0., to the gumming roll 5 as diagrammatically indicated. In the illustrated example, the gumming roll 5 is located in spaced relation to and beneath a second .roll 9 which for convenience of description may be termed a "reversing roll" and which may form part of a feeding means and co-operate with a feed roller ID; the rolls 9 and ill may also be journalled in the machine in any usual and wellknown way. In addition to their other functions, the rolls 9 and i0 serve to develop a feeding action and pressure upon the elements II to which the sheets of paper 8 or other equivalent are to be pasted, a bed or other suitable support i2 being provided for guiding the elements ll between the rolls 9 and ill. The elements ii may exemplify paper box blanks or any other material or devices-customarily operated on by gumming machines of the type in question for the purpose of adhesively' combining therewith the sheets of paper 8 or other equivalent. A suitably operated conveying belt I3 or equivalent means may be located in receiving relation to the rolls 9 and it) for the purpose of receiving the combined elements Ii and sheets 8 or their equivalent and transferring them 'to other mechanisms or to other positions for further disposition depending upon the nature of the work being done.

The illustrated novel pick-off means comprises a deflecting device which in practice occupies a stationary position, and a spring controlled pickolT device movable relatively to said deflecting device in operative relation thereto. The deflecting device consists of an arm I4 fixed for instance by means of a set screw it, upon a suitable stationary support illustrated in the form of ,a rod i5 conveniently mounted in the machine of which it forms a part. In the example shown the rod I5 is located in spaced parallel relation to the rolls 5 and 9 with the arm i4 extending from said rod toward the reversing roll 9 and provided at its free end with a deflector IS; the latter is preferably adjustably mounted on the arm I4 for instance by means of screws I1 and slots i8 and is'provl'ded with a curved deflecting edge i9 located in spaced proximity to the surface of the reversing roll 9. The pick-off device is pivotally vice.

carried by the rod i5 so as to be capable of pivotal movement relative to the deflecting device and in the illustrated arrangement includes a lever 28 pivotally mounted upon a hub 2| which forms an integral part of the arm I4, as clearly shown in Fig. 3; any suitable means may be provided for maintaining the lever 20 in position upon the hub 2i, as for instance a collar 22 secured in place by means of a. set screw 23. The lever 28 at its free end carries a pick-off member 24 which projects from said lever 20 toward the gumming roll 5 and is adjustably secured to said lever, for instance by means of screws 25 and slots 28, as shown in Fig. 1.

- The pick-off member 24 terminates in a tapered free end consisting of a lower curved edge 21 conforming to and resting upon the surface of the gumming roll 5 in the operative position of the parts, and an upper straight edge 28 extending in an upward inclination in a return direction from said surface of the gumming roll 5 toward the deflecting edge IS. The lever 28 is acted upon by a spring 29 in a manner to yieldingly maintain the lower curved edge 21 of the pick-ofi member 24 in engagement with the gumming roll 5, as illustrated in Fig. l. The preferred arrangement further includes an adjustable means for determining the position of the deflecting edge l8 relatively to the roll 8, this adjustable means being shown in the drawing in the form of a screw 30in threaded engagement with the arm l4 and terminating upwardly beyond the same in a squared end 3| or equivalent means for facilitating the manipulation of said adjusting screw 30; a lock nut 32 is preferably provided for fixing the screw 30 in an adjusted position. The screw 30 rests upon and bears against a stationary member 33 forming part of the gumming machine and suitably located in co-operative position beneath the screw 30, as shown in Fig. 1. It will be obvious, by suitably manipulating the screw 30, that the arm l4 and its associated elements may be pivotally adjusted about the rod l5 to set the deflecting edge I!) in any predetermined or desired relation to the reversing roll 8, within the range of the arrangement.

In practice the pick-off means consists of a unit comprising the stationary deflecting device and the spring pressed pick-off device located in co-operative relation to said deflecting device, as illustrated in Fig. 2, the pick-oil? device being pivotally movable relatively to the deflecting de- It will be understood that a plurality of such units in the number required for efllcient operation, are located in the gumming machine at spaced intervals lengthwise of the rolls 5 and 8 or their equivalent.

In operation the sheets of paper 8 or other material are fed to the gumming roll 5 and picked up by the adhesive coated surface thereof as illustrated in Fig. 1, said sheets 8 or their equivalent in their travel over the roll 5 being coated with adhesive on the onesurface by the action of said gumming roll 5. As the sheets 8 reach the pick-ofi' members 24, said sheets 8 or their equivalent will be stripped from the surface of the gumming roll 5 and by the action of the straight" upper edges 28 of the pick-oil. member will be guided to the deflecting edges l9. These edges will divert the travel of the sheets 8 or their equivalent in the manner indicated in Fig. 1, and

will finally bring the adhesive coated surfaces and ID in the illustrated example of the machine so that by the action of the said rolls 9 and III the sheets 8 will be securely pasted in surface contact with the elements I I. The combined elements II and sheets 8 will then pass to the conveyor belt l3 for further operative steps or to another point for further disposition.

The curved lower surface 21 of the pick-off member 24 provides an eflicient support for said member and maintains the pick-off device in a position of maximum efliciency. At the same time this curved lower surface 21 reduces the tendency of the point of the pick-off member 24 to wear down and consequently materially reduces the necessity for replacement. When replacement is required the lever 20 and the associated pick-oil member 24 may be easily removed as an independent unit to make this possible As supports such as the rod i 5 are generally supported in the machine in a manner to be easily removable, the detachment of the lever 28 therefrom may be easily accomplished whenever the aforesaid replacement becomes necessary. An important feature of the novel arrangement resides in the fact that any wear on the pick-off member 24 does not effect the operative relation of the deflector means and more particularly the deflector edge l9 thereof, relatively to the reversing roll 9. This is due to the fact that the deflecting device and the pick-off device comprise independent members of which the deflecting device is stationary and the pick-off device is capable of movement relatively thereto. The novel pick-oi! means is extremely simple in construction and economical to produce and requires no skilled supervision in its operation or maintenance.

Various changes in the specific forms shown and described may be made within the scope of the claims without departing from the spirit of the invention.

I claim:

1. In a gumming machine including a gumming roll and a reversing roll, that improvement which comprises a pick-off device consisting of a supporting rod in spaced parallel relation tosaid mils, an arm fixed on said rod and extending therefrom toward said reversing roll, a deflector adjustably mounted on said arm and having a curved deflecting edge located in spaced proximity to the surface of the reversing roll, a stationary member, an adjustable stop carried by said arm and engaging said stationary member for determining the position of said deflecting edge relatively to said reversing roll, a hub forming an integral part of said arm, a lever pivotally mounted on said hub, a pick-off member ad-. justably carried by said lever and projectingtherefrom toward said gumming roll, said pickoif member having a tapered free end consisting of a lower curved edge conforming to and resting upon the surface of said gumming roll and an upper straight edge extending in an upward inclination from said surface of the gumming roll in a direction toward said deflecting edge, a spring acting on said pick-off-member for yieldingly maintaining the lower curved edge thereof in engagement with said gumming roll, and a collar fixed on said hub for maintaining said lever in place thereon.

2. In a gumming machine including a gumming roll and a reversing roll, that improvement which comprises a pick-oil device consisting of a supporting rod in spaced parallel relation to said rolls, a deflecting device fixed upon said rod and having a curved deflecting edge located in spaced proximityto the surface of said reversing roll, adjustable meangfor determining the position of said deflecting edge relatively to said reversing roll, a pick-oil device'mounted on said rod and pivotally movable relatively thereto, said pick-oi! device having a tapered free end consisting of a lower-curved edge-coniorming to and resting upon the surface of said gu mming roll and an upper straight edge extending in an upward inclination from said surface of the gumming roll in a direction toward said deflecting edge, and a spring acting on said pick-oi! device to yieldingly maintain the lower curved edge thereof in engagement with said gumming roll.

3. In a gumming machine including a gumming roll and a reversing roll, that improvement which comprises a pick-oil device consisting of a supporting rod in spaced parallel relation to said rolls, a deflecting device flxed upon said rod and having-a, curved deflecting edge located in spaced proximity to the surface of said reversing roll, a pick-elf device pivotally carried by said rodand having a tapered free end consisting of a lower curved edge conforming to and resting upon the surface of saidgumming roll and an upper straight edge inclined in a return direction from said surface of the gumming roll, and a spring acting on said pick-oil device to yieldingiy maintain the lower curved edge thereof in engagement with said gumming roll.

4. A pick-oi! means of the-kinddescribed comprising a stationary deflecting device provided with a curved deflecting edge at its free end, a hub forming an integral part of said deflecting device, a pick-off device pivotally mounted on said hub and pivotally movable relatively to said deflecting device, said pick-off device having a tapered free end consisting of a curved lower edge and a straight upper edge inclined upwardly in a return direction toward said deflecting edge, and a spring acting on said pick-oil device to yieldingly force the same in a given direction.

5. A pick-oil means of the kind described comprising a stationary deflecting device provided with a curved deflecting edge at its free end, and a spring pressed pick-oi! device pivotally movable relatively to said deflecting device and having a tapered free end consisting 01' a curved edge and a straight edge inclined in a return direction relatively to said curved edge.

6. In a pick-oil means of the kind described, the combination of a stationary deflecting device, and a spring pressed pick-d device in co-operative relation with said deflecting device and pivotally movable relatively thereto.

GEORGE W. van HOFE. 

